What is MRI?

Magnetic Resonance Imaging is a diagnostic scanning technique based on the principles of magnetic resonance. MRI uses a strong magnetic field and radiofrequency waves to produce detailed images of the internal organs and tissues.

Is it safe?

There are no known risks or side effects associated with MRI.

Unlike traditional X-rays and CT scans MRI does not require the use of ionising radiation. MRI scans can therefore be performed repeatedly without adverse effect.

During the scan, the main magnetic field strength is altered using electromagnetic coils. This causes a wide range of sounds during the scan procedure including banging, buzzing and rumbling noises. These noises are loud and we strongly recommend that you use the earplugs or headphones provided.

The scanner table has a patient weight limit, but this varies between centres. Please contact us if you weigh over 150kg (23st).

IMPORTANT SAFETY INFORMATION

It is NOT possible to have an MRI examination if you have:

• A heart pacemaker
• Surgical clips within your head
• Certain metallic heart valves
• Inner ear implants (eg cochlear)
• Some neuroelectrical stimulators
• Metal fragments within your eye or head

If you have any of the above please inform the Centre as soon as possible.

(Please Note: If you have ever had metal fragments in your eyes due to a penetrating injury and have not had your eyes checked you will require an X-ray of your eyes to ensure there are no fragments still remaining.)

Also please consult the Centre if you:

• are or may be pregnant
• have had recent surgery that has required the insertion of metal whether this be joint replacements or clips the scan may have to be delayed for a few weeks to allow time for the body to heal properly around the surgical site.

If you have any fillings or other dental fixtures, the MRI examination can still be carried out.

Can I eat and drink?

You may eat, drink and continue to take any medication prior to your MRI scan. If you are having a scan of your abdomen you may be asked to fast for four hours before your scan.

Will it be Painful?

No. An MRI scan is a painless procedure, but you must be able to keep very still and lie quite flat. If you are unable to keep still or lie flat please contact us.

Will I need an injection?

Some patients may need an injection to enhance the images, usually in parts of the body which have poor natural contrast. In most patients the injection is given in the vein in your elbow (the same place as a blood test). The injection should have no adverse-effects. Please note that this is not the same kind of injection which you may have had before during X-ray procedures such as CT.

How long will it take?

For one part of your body to be scanned it generally takes about 30 - 45 minutes. Therefore, it will take proportionately longer to scan more than one part of your body. The length of the scan may also vary depending upon the diagnosis being sought, for example, it often takes longer to produce high resolution images when very small anatomical structures are being scanned.

The important thing to remember is that there is no connection between the length of the scan and finding something wrong.

Your appointment

In most cases your appointment will be made over the phone so that you can select an appointment convenient to you. When the appointment is made you will be asked a few questions about your medical history to ensure that it is safe for you to have an MRI scan.

On the day of your appointment you will need to arrive about 15 minutes beforehand. You will be asked to fill out and sign a safety questionnaire; this ensures that there are no reasons why you should not have an MRI scan. You will be asked to remove any loose metal objects, credit cards and watches and most patients will need to change into a gown. Your belongings will be locked away safely.

The Radiographer (the person who operates the equipment) will take you into the MRI room and position you for the scan. During the examination you will be able to listen to the radio via the provided headphones or if you prefer you may bring a CD that can be played during the examination. After your scan you will be offered something to drink and are free to go home.

When and where do I get the result?

The Radiologist (specialist doctor) will write a report to your referring doctor detailing the findings from the scan.

The report will be sent to, and available at, your follow up appointment with the doctor who referred you for the MRI. The films will either be sent to you at your home address or sent with the report to your consultant.

Please do not ask the Radiographer for a result as they are unable to give one.

Any Other Questions?

If you have any other questions, worries or doubts do not hesitate to ask one of our staff; we want you to feel as comfortable as possible.